diff --git a/product/ERP5/Document/Document.py b/product/ERP5/Document/Document.py
index 3bc880a8158647ebab45472ec68db710fe44e6f9..ee376958b8f901f960f1b7fd95b1bb4e9c7cf9a4 100644
--- a/product/ERP5/Document/Document.py
+++ b/product/ERP5/Document/Document.py
@@ -1178,7 +1178,7 @@ class Document(XMLObject, UrlMixIn, ConversionCacheMixin, SnapshotMixin):
     """
     raise NotImplementedError
 
-  def convertFile(self, msg=None):
+  def convertFile(self, **kw):
     """
     Workflow transition invoked when conversion occurs.
     """